code: def test_table_delete_multiple_callback(self, sentinel):
      s1 = sentinel(False)
      s2 = sentinel(False)
  
      def callback1():
          s1.set(True)
  
      def callback2():
          s2.set(True)
  
      tbl = Table([{"a": 1}])
      tbl.on_delete(callback1)
      tbl.on_delete(callback2)
  
      tbl.delete()
  
      assert s1.get() is True
      assert s2.get() is True
  
file_path: perspective/python/perspective/perspective/tests/table/test_delete.py
imports: from perspective.table import Table
label_desc: Use image node_id 4 for calling the TestDelete obj's underlying member method code with example usage: obj.test_table_delete_multiple_callback(sentinel) without return types